Math Strategies: Adding and Subtracting Tens

What is the main focus of the video tutorial?

• Adding and subtracting hundreds

• Adding and subtracting tens

• Multiplying and dividing tens

• Adding and subtracting units

How many tens are there in the number 30?

• 4 tens

• 1 ten

• 3 tens

• 2 tens

What is the sum of 30 and 40?

• 90

• 70

• 60

• 80

How many tens are there in the number 20?

• 4 tens

• 1 ten

• 2 tens

• 3 tens

What is the sum of 20 and 30?

• 70

• 40

• 60

• 50

What is the result of subtracting 20 from 70?

• 60

• 70

• 40

• 50

How many tens are left after subtracting 20 from 70?

• 6 tens

• 5 tens

• 4 tens

• 3 tens

What is the result of subtracting 30 from 80?

• 70

• 60

• 50

• 40

How many tens are left after subtracting 30 from 80?

• 6 tens

• 4 tens

• 5 tens

• 3 tens

What strategy is used to solve subtraction problems in the video?

• Using addition

• Using multiplication tables

• Using place value blocks

• Using division